GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Chevrolet
🢒
2003
🢒
Chevy Suburban - 2WD
🢒
Transmission/Transaxle
🢒
Automatic Transmission - 4L80-E/4L85-E
🢒 Automatic Transmission Controls Schematics
Figure
1:
Valve Controls and Brake Switch
Master Electrical Component List
Electronic Component Description
Switch Inputs
Automatic Transmission Schematic Icons
Ignition, Run and Start Bus Bar
Ignition, Run, Start, Accy Bus Bar
BRAKE, HTR/AC, HVAC I, CRUISE, 4WD
Stoplamp Switch and Traction Control Switch
IGN 0, TBC IGN 0, TBC ACCY, SEO ACCY, WS WIPER, RR WIPER
Figure
2:
Switch Inputs
Master Electrical Component List
Electronic Component Description
Tow/Haul Switch and PNP Switch Inputs
Valve Controls and Brake Switch
Automatic Transmission Schematic Icons
Figure
3:
Tow/Haul Switch and PNP Switch Inputs
Master Electrical Component List
Electronic Component Description
Vehicle Speed Signal and 4WD Low Signal
Switch Inputs
Automatic Transmission Schematic Icons
SP205 - 2 of 2
G203 - 2 Of 2
G203 - 1 Of 2
G203 - 1 Of 2
G102, G103
Figure
4:
Vehicle Speed Signal and 4WD Low Signal
Master Electrical Component List
Electronic Component Description
Tow/Haul Switch and PNP Switch Inputs
Automatic Transmission Schematic Icons